In Splunk Enterprise versions below 9.2.2, 9.1.5, and 9.0.10 and Splunk Cloud Platform versions below 9.1.2312.200 and 9.1.2308.207, a low-privileged user that does not hold the admin or power Splunk roles could craft a malicious payload through a Splunk Web Bulletin Messages that could result in execution of unauthorized JavaScript code in the browser of a user.
https://securityaffairs.com/165204/security/splunk-enterprise-and-cloud-platform-flaws.html
https://research.splunk.com/application/fd852b27-1882-4505-9f2c-64dfb96f4fc1